Are phone calls equally likely to occur any day of the week? The day of the...

50.1K

Verified Solution

Question

Basic Math

Are phone calls equally likely to occur any day of the week? Theday of the week for each of 392 randomly selected phone calls wasobserved. The results are displayed in the table below. Use an ?? =0.10 significance level.

  1. Complete the rest of the table by filling in the expectedfrequencies:
    Frequencies of Phone Calls for Each Day of theWeek
    OutcomeFrequencyExpected Frequency
    Sunday55
    Monday54
    Tuesday64
    Wednesday50
    Thursday58
    Friday57
    Saturday54
  2. What is the correct statistical test to use?
    Select an answer Paired t-test Independence Goodness-of-FitHomogeneity  
  3. What are the null and alternative hypotheses?
    H0:H0:
    • Phone calls and days of the week are independent.
    • The distribution of phone calls is uniform over the days of theweek.
    • Phone calls and days of the week are dependent.
    • The distribution of phone calls is not uniform over the days ofthe week.



    H1:H1:
    • The distribution of phone calls is uniform over the days of theweek.
    • Phone calls and days of the week are dependent.
    • The distribution of phone calls is not uniform over the days ofthe week.
    • Phone calls and days of the week are independent.
  4. The degrees of freedom =  
  5. The test-statistic for this data =  (Please show youranswer to three decimal places.)
  6. The p-value for this sample = (Please show your answer to fourdecimal places.)  
  7. The p-value is Select an answer greater than less than (orequal to)  ??  
  8. Based on this, we should Select an answer fail to reject thenull reject the null accept the null  
  9. Thus, the final conclusion is...
    • There is sufficient evidence to conclude that phone calls anddays of the week are dependent.
    • There is insufficient evidence to conclude that phone calls anddays of the week are dependent.
    • There is insufficient evidence to conclude that thedistribution of phone calls is not uniform over the days of theweek.
    • There is sufficient evidence to conclude that the distributionof phone calls is not uniform over the days of the week.
    • There is sufficient evidence to conclude that the distributionof phone calls is uniform over the days of the week.

Hint: Helpful Video [+]
Help

Answer & Explanation Solved by verified expert
4.3 Ratings (649 Votes)
Solution Here we have to use chi square test for goodness of fit Null hypothesis H0 Phone calls are equally likely to occur any day of the week Alternative hypothesis Ha Phone calls are not equally likely to occur any day of the week We are given level of significance 010 Test statistic formula is given as below Chi    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students